Experimental study on mercury removal by Taixi activated coke under complex atmosphere of flue gases

ZHANG Hai-ru; LIU Hao; WANG Meng; WU Hao; YANG Hong-min

Volume 40 Issue 10

Oct. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(10): 1269-1275

ZHANG Hai-ru, LIU Hao, WANG Meng, WU Hao, YANG Hong-min. Experimental study on mercury removal by Taixi activated coke under complex atmosphere of flue gases[J]. Journal of Fuel Chemistry and Technology, 2012, 40(10): 1269-1275.

Citation:

ZHANG Hai-ru, LIU Hao, WANG Meng, WU Hao, YANG Hong-min. Experimental study on mercury removal by Taixi activated coke under complex atmosphere of flue gases[J]. Journal of Fuel Chemistry and Technology, 2012, 40(10): 1269-1275.

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Experimental study on mercury removal by Taixi activated coke under complex atmosphere of flue gases

School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China

Received Date: 2011-12-13
Rev Recd Date: 2012-02-28
Publish Date: 2012-10-31

Abstract

Abstract

In order to clarify the adsorption characteristic of activated coke under complex atmosphere of flue gases, a series of tests were conducted with a bench-scale fixed bed reactor. The simulated flue gas was prepared by mixing main composition of flue gas with mercury vapors generated through permeation tube. The surface properties were characterized by FT-IR. The results show that the performance of mercury removal is related to the surface chemistry of activated coke,and the oxygen-containing functional groups are the important factor affecting the adsorption and catalysis of Hg⁰. The adsorption performance of Hg⁰ with activated coke is influenced by SO₂ obviously and inhibition is observed in the removal process. With increasing concentration of SO₂, from 400, 855 to 1 520 mL/m³, the concentration of Hg⁰ at the outlet of the reactor increased from 36, 43 to 48 μg/m³. The complex impact of NO on the adsorptive capacity of Hg⁰ is found that NO with lower concentration promotes the adsorption of elemental mercury while inhibits it at higher value in CO₂/N₂/O₂/NO/Hg⁰ system. The increasing concentration of NO with the stationary concentration of SO₂ has a promotion to mercury adsorption while O₂, NO, SO₂ and Hg⁰ exists simultaneously. However, the increasing concentration of SO₂ could enhance the mercury adsorption at initial stage and prevents it at the latter stage.
- activated coke,
- mercury removal,
- complex atmosphere of flue gas,
- adsorption

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References(30)

References

YUDOVICH Y E, KETRIS M P. Mercury in coal a review: Part 2 Coal use and environmental problems[J]. Int J Coal Geol, 2005, 62(3): 135-165.

况敏, 杨国华, 胡文佳, 陈武军. 燃煤电厂烟气脱汞技术现状分析与展望[J]. 环境科学与技术, 2008, 31(5): 66-70. (KUANG Min, YANG Guo-hua, HU Wen-jia, CHEN Wu-jun. Analysis and prospect of technology for removing mercury from flue gas[J]. Environmental Science & Technology, 2008, 31(5): 66-70.)

ZENG H C, JIN F, GUO J. Removal of elemental mercury from coal combustion flue gas by chloride-impregnated activated carbon[J]. Fuel, 2004, 83(1): 143-146.

任建莉, 周劲松, 骆仲泱, 岑可法. 活性碳吸附烟气中气态汞的试验研究[J]. 中国电机工程学报, 2004, 24(2): 171-175. (REN Jian-li, ZHOU Jin-song, LUO Zhong-yang, CEN Ke-fa. An experimental study on activated carbon sorbents for gas-phase mercury removal from flue gas[J]. Proceedings of the CSEE, 2004, 24(2): 171-175.)

任建莉, 周劲松, 骆仲泱, 徐璋, 张雪梅. 钙基类吸附剂脱除烟气中气态汞的试验研究[J]. 燃料化学学报, 2006, 34(5): 556-561. (REN Jian-li, ZHOU Jin-song, LUO Zhong-yang, XU Zhang, ZHANG Xue-mei. Ca-based sorbents for mercury vapor removal from flue gas[J]. Journal of Fuel Chemistry and Technology, 2006, 34(5): 556-561.)

MORENCY J R, PANAGIOTOU T, SENIOR C L. Zeolite sorbent that effectively removes mercury from flue gases [J]. Filtrat Sep, 2002, 39(7): 24-26.

MILLER S J, DUNHAM G E, OLSON E S, BROWN T D. Flue gas effects on a carbon-based mercury sorbent[J]. Fuel Process Technol, 2000, 65-66: 343-363.

LIU W, VIDIC R D, BROWN T D. Impact of flue gas conditions on mercury uptake by sulfur-impregnated activated carbon [J]. Environ Sci Technol, 2000, 34(1): 154-159.

YAN R, LIANG D T, TSEN L, WONG Y P, LEE Y K. Bench-scale experimental evaluation of carbon performance on mercury vapor adsorption[J]. Fuel, 2004, 83(18): 2401-2409.

张斌, 侯文慧, 范朋慧, 杨蒙, 杨宏旻. 工艺参数对活性焦烟气中联合脱硫脱汞性能的交互影响[J]. 煤炭学报, 2010, 35(9): 1548-1552. (ZHANG Bin, HOU Wen-hui, FAN Peng-hui, YANG Meng, YANG Hong-min. Interactive effect of operation parameters on the combined removal of SO₂ and mercury in flue gas using activated coke[J]. Journal of China Coal Society, 2010, 35(9): 1548-1552.)

李兰廷. 活性焦脱硫脱硝的机理研究-烟气组成的影响[J]. 煤炭学报, 2010, 35(增刊): s185-s189. (LI Lan-ting. Mechanism of removal of SO₂ and NO on activated coke: Effect of component of flue gas on activated coke[J]. Journal of China Coal Society, 2010, 35( Suppl): s185-s189.)

GUERRA D L, AIROLDI C, VIANA R R. Performance of modified montmorillonite clay in mercury adsorption process and thermodynamic studies [J]. Inorg Chem Commun, 2008, 11(1): 20-23.

WASEWAR K L, PRASAD B, GULIPALLI S. Removal of selenium by adsorption onto granular activated carbon (GAC) and powdered activated carbon (PAC)[J]. Clean-soil Air Water, 2009, 37(11): 872-883.

SONG X L, LIU H Y, CHENG L, QU Y X.Surface modification of coconut-based activated carbon by liquid-phase oxidation and it effects on lead ion adsorption[J]. Desalination, 2010, 255(1/3): 78-83.

LI Y H, LEE C W, GULLETT B K. The effect of activated carbon surface moisture on low temperature mercury adsorption[J]. Carbon, 2002, 40(1): 65-72.

SWANEPOEL J C, STRYDOM C A. Utilization of fly ash in a geopolymeric material[J]. Appl Geochem, 2002, 17(8): 1143-1148.

金峰, 曾汗才, 钟毅, 张鹏宇, 许绿丝. 颗粒活性炭对汞的吸附实验研究[J]. 电力科学与工程, 2003, (1): 1-4. (JIN Feng, ZENG Han-cai, ZHONG Yi, ZHANG Peng-yu, XU Lü-si. Experimental investigation on mercury adsorption by granular activated carbons[J]. Electric Power Science and Engineering, 2003, (1): 1-4.)

黄正宏, 康飞宇, 吴惠, 梁开明. 湿氧化改性多孔碳对低浓度苯和丁酮蒸气的吸附[J]. 清华大学学报(自然科学版), 2000, 40(10): 111-115. (HUANG Zheng-hong, KANG Fei-yu, WU Hui, LIANG Kai-ming. Adsorption of benzene and methylethyl ketone vapors at low concentration by wet oxidized porous carbons[J]. Journal of Tsinghua University(Science and Technology), 2000, 40(10): 111-115.)

MATIJEVIC E, COUCH J P, KERKER M. Detection of metal ion hydrolysis by coagulation IV zinc[J]. J Phys Chem, 1962, 66(1): 111-116.

LI Y H, LEE C W, GULLETT B K.Importance of activated carbons oxygen surface functional groups on elemental mercury adsorption [J]. Fuel, 2003, 82(4): 451-457.)

PRESTO A A, GRANITE E J. Impact of sulfur oxides on mercury capture by activated carbon[J]. Environ Sci Technol, 2007, 41(18): 6579-6584.

PRESTO A A, GRANITE E J, KARASH A. Further investigation of the impact of sulfur oxides on mercury capture by activated carbon[J]. Ind Eng Chem Res, 2007, 46(24): 8273-8276.

杨宏旻, 张斌, 侯文慧, 周强, 叶碧翠, 余刚. 负载CuO/Cl活性炭的气态汞脱除特性[J]. 南京航空航天大学学报, 41(6): 814-818. (YANG Hong-min, ZHANG Bin, HOU Wen-hui, ZHOU Qiang, YE Bi-cui, YU Gang.Removal characteristics of vapour-phase elemental mercury through active Carbon-Supported CuO/Cl[J]. Journal of Nanjing University of Aeronautics & Astronautics, 41(6): 814-818.)

许绿丝. 改性处理活性炭纤维吸附氧化脱除SO₂/NO_x/Hg的研究. 武汉: 华中科技大学, 2007. (XU Lü-si. Study on adsorption and oxidation removal of SO₂/NO_x/Hg at low-temperature by modified activated carbon fiber.Wuhan:Huazhong University of Science and Technology, 2007.)

SHIRAHAMA N, MOCHIDA I, KORAI Y. Reaction of NO₂ in air at room temperature with urea supported on pitch based activated carbon fiber [J]. Appl Catal B, 2004, 52(3): 173-179.

SHIRAHAMA N, MOCHIDA I, KORAI Y. Reaction of NO with urea supported on activated carbons[J]. Appl Catal B, 2005, 57(4): 237-245.

OLSON E S, MILLER S J, SHARMA R K. Catalytic effects of carbon sorbents for mercury capture[J]. J Hazard Mater, 2000, 74(1): 61-79.

SHARMA R K, DUNHAM G E, SHARMA R K, MILLER S J. Mechanisms of mercury capture and breakthrough on activated carbon sorbents.[C]//National Meeting of the American Chemical Society. Washington DC: American Chemical Society, Division of Fuel Chemistry, 2000: 886-889.

LAUMB J D, BENSON S A, OLSON E S. X-ray photoelectron spectroscopy analysis of mercury sorbent surface chemistry[J]. Fuel Process Technol, 2004, 85(6/7): 577-585.

OLSON E S, SHARMA R K, MILLER S J, DUNHAM G E. Identification of the breakthrough oxidized mercury species from sorbents in flue gas[C]//Proceedings of the Specialty Conference on Mercury in the Environment. Minneapolis, MN: 1999: 121- 126.

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